Helve hammer



Sept 19, 1933.

. E. F. MEYERING HELVE HAMMER 2 Sheets-Sheet 1 Filed Jan. 11, 1932gwumam Edwin if Mc yerny,

Sept. 19, 1933 E. F. MEYERING HELVE HAMMER 2 Sheets-Sheet 2 Filed Jan.11, 1932 will} Patented Sept. 19, 1933 were!) STATES PATENT" OFFICEHELVE HAMMER Application January 11, 1932.

15 Claims.

The present invention relates to helve hammers.

The object of the present invention is to improve the construction ofhelve hammers of the type shown and described in the Leckinger Patent,No. 1,298,741, dated April 1, 1919, in which a reciprocating tool orhammer is operated by a power driven helve.

The object of the present invention is to improve the construction ofcertain parts of such machine so as to obtain greater durability, alsoto relieve strain on other parts, and also to stabilize the action ofthe machine.

The invention relates particularly to the assembly of the resilientcushion between the forward end of the helve and the reciprocating toolor hammer. In previous designs or methods, the cushion was held inassembly with both helve and hammer in such a manner which necessitatedeither a relatively tight assembly or the use of cushions of tubularconstruction which have a tendency to float or shift during action,causing friction at several points, also tending to cramp during thereciprocatory action and also causing a binding effect against rotationof the reciprocating tool or hammer when such rotation is desirable, allof which resulted in undue wear and frequent replacement of parts.

The primary object of the present invention is to rigidly secure thecushion to the underside of the helve so that the helve and the cushionwill move as a unit and the friction and impact incident to striking thereciprocating tool or hammer will be confined to the lower face of thecushion and the friction thereby reduced to a minimum and thusmaterially prolong the life of the resilient cushion.

Another object of the invention is to provide a cushion assembly adaptedto eliminate the necessity of holding close tolerance in the matter ofthe length of the ram strap and critical adjustments of the helve.

Another object of the invention is to provide a cushion assembly whichwill enable a cushion consisting of a solid block of resilient materialto be employed instead of a tubular cushion and thereby provide agreater volume of material in the given space occupied by the cushion.

It is a further object of the invention to eliminate the stem, tube orother retaining member herefore employed on the upper end of thereciprocating tool or hammer, thereby reducing the cost and simplifyingthe manufacture and at the same time enabling a smooth surface to beprovided at the upper face on top of the hammer Serial No. 586,052

which comes in contact with the lower face of the cushion when the helveis in action.

Furthermore, the invention has for its object to provide a cushionassembly in which the cushion is rigidly secured to the helveindependent of the means for connecting the reciprocating tool or hammerwith the helve and thereby relieve the hammer of the binding effectagainst the rubber to which it has heretofore been subjected and enablethe hammer to rotate more freely when such rotation is desired which inturn lessens the burden on the teeth of the gear and worm which rotatethe hammer, and at the same time reduce the power consumption.

Also, it is an object of the invention to elimimate the necessity ofdisassembling the helve by removing the connection of the same with thereciprocating tool or hammer in order to replace the cushion.

With these and other objects in view, the

invention consists in the novel construction, combination andarrangements of parts hereinafter fully described, illustrated in theaccompanying drawings and pointed out in the claims hereto appended, itbeing understood that various changes in the form, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of the invention.

In the drawings:

Figure 1 is a side elevation of a helve hammer constructed in accordancewith this invention.

Figure 2 is an end elevation of the cushion assembly shown in Figure 1.

Figure 3 is a detail side elevation of a portion of the helveillustrating another manner of securing the cushion to the helve.

Figure 4 is an end elevation of the same.

Figure 5 is a detail side View of the front portion of ahelveillustrating another means for securing the cushion to the same.

Figure 6 is an end elevation of the same.

Referring particularly to Figures 1 and 2 of the drawings, 1 designatesa power driven helve of the ordinary construction bolted or otherwisesecured to a rocker plate 2 which is pivoted at 3 to upwardly extendinglugs i of an overhanging arm 5 of the frame 6 of the helve hammer. Theframe of the helve hammer and the means for mounting the power drivenhelve are substantially the same as shown and described in the aforesaidpatent and a particular description and detail illustration of the frameand the power-actuating means is, therefore, deemed unnecessary.

The helve is provided at its forward end with a cushion 6 consisting ofa solid block of rubber or other resilient material rigidly secureddirectly to the lower face of the said helve so that the helve and thecushion move or vibrate as a unit to confine to the lower face 7 of thecushion the friction and impact incident to striking the hammer 8 whichreciprocates vertically in the outer end of the overhanging arm asclearly indicated in Figure 1 of the drawings. Various means may beemployed for rigidly securing the cushion to the lower face of the helveand in Figures 1 and 2 of the drawings, the cushion is secured to thehelve by means of a metal strap 9 which is fit ed on the forward orfront end of the helve and extends around the front and rear portions ofthe cushion and rigidly binds the cushion to the helve. The cushion 6*is provided with front and rear portions 10 which are of less thicknessthan the intermediate or body portion of the cushion G" whichintermediate or body portion extends below the reduced extended frontand rear portions 10 and presents to the upper face 11 of the hammer itsimpact face 7 which is preferably convex but a flat or any other shapedlower impact face may, of course, be provided.

The metal strap, which may be constructed of any suitable material,extends over the top and downward at the side faces of the helve and itscentral portion below the helve is cut away to form front and reardownwardly extending or depending loops 12 which receive and engage theextended front and rear portions 10 of the cushion and firmly andrigidly bind. the same to the lower face of the helve. The metallicstrap 9, which rigidly secures the cushion G directly to the lower faceof the helve, may be tapered at its upper portion as shown or of anyother desired configuration and it is detachably secured to the helve bymeans of a bolt 13 or other suitable fastening device located beyond theflexible strap or yoke 14 which connects the reciprocating hammer withthe helve 1. The bolt 13 which extends transversely through the helveand both sides of the metallic strap is adapted to be readily removed toenable the metallic strap and the cushion to be removed from the helvefor replacing a wornout cushion with a new cushion without the necessityof disassembling the helve, hammer and flexible strap or yoke. This willenable a new cushion to be substituted for an old cushion without theloss of time heretofore experienced when it was necessary to remove thehelve or wooden member 1 from the rocker arm 2.

The hammer is provided at its upper end with a horizontal peripheralflange 15 forming a circular head at the top of the hammer and a washer16 of the wall construction is arranged on the upper end of he hammerinterposed between the flange 15 and the bottom portion of the flexiblestrap or yoke. The flexible strap or yoke is of the usual construction.

In Figures 3 and 4 of the drawings is illustrated another method ofrigidly securing a cushion 17 directly to the lower face of the helve18. The cushion 17 is of substantially the same form as the cushionheretofore described being provided with front and rear extensions 19 ofless thick,- ness than the intermediate or body portion of the cushion.The extensions 19 are located at the top portion of the cushion and arerigidly secured to the helve by vertical bolts 20 which pierce theextended portions 19 and the helve midway between the side faces of thehelve as clearly illustrated in Figure l of the drawings.

0 The bolts 20 are preferably headed at their lower ends and provided attheir upper ends with nuts 21 and transversely disposed metal plates 22which extend across the lower faces of the extension 19 are interposedbetween the same and the heads of the bolts. Suitable washers 23 arearranged on the upper portions of the bolts and are interposed betweenthe nuts 21 and the helve which is preferably provided with recesses 24at its upper face to receive the said washers. This construction willenable the bolts and nuts to be tightened sufiicicntly to ri idly securethe cushion directly to the lower face of the helve without injuringeither the cushion or the helve.

In Figures 5 and 6 of the drawings is illustrated another method ofrigidly securing a cushion 25 to the lower face of a helve 26. In thisform of the invention, the cushion 25 which consists of a solid block ofrubber or other suitable resilient material is vulcanizcd to a metallicplate 27 which is fitted directly to the lower face of the helve 26. Themetallic plate 27 extends in advance and in rear of the cushion and itsextended portions 28 are pierced by vertical bolts 29 which also extendsthroughthe helve midway between the side faces thereof as clearlyillustrated in Figure 6 of the drawings. The bolts 29 which are providedat their lower ends with heads have nuts 30 at their upper threadedends. The heads of the bolts engage the lower face of the plate 27 atthe extended ends thereof andmetallic washers 31 are interposed betweenthe nuts and the helve being preferably arranged in recesses 32 in theupper face of the helve. This will enable the cushion to be rigidlysecured directly to the lower face of the helve without injury to thecushion or the helve. The cushion in each of the forms of the inventionis prefer ably naturally tapered at its lower portion as shown. I Y

The flexible strap or yoke is of the ordinary construction and itstretches from the circular form shown in Figure 2 of the drawings whenthe helve moves upwardly. This leaves a slight space between the rubberbuffer and the ram or hammer which is struck by the rubber buffer in thedown ward riveting movement. The rubber buffer receives the rebound ofthe hammer and the flexible character of the yoke or strap provides thenecessary play or movement of the parts incident to the pivotal movementof t -e helve and the vertical movement of the hammer.

When rotary movement of the hammer is desired it is provided with a wormgear 33, which meshes with an actuating worm 34 operated substantiallyas shown and described in the aforesaid patent. As any suitable meansmay, of course, be employed for actuating the worm, further descriptionand illustration thereof are deemed unnecessary. The rigid attachment.of the cushion directly to the lower face of the helve independently ofthe connection between the helve and the hammer relieves the hammer ofthe binding effect which necessarily results when common means isemployed for connecting the hammer, the cushion, and the helve together;and the hammer is permitted to rotate more freely and the burden on theteeth of the worm gear and the worm is reduced and the consumption ofpower is also materially reduced.

The force of the blows are more uniform as the weight of the cushion isin a fixed position commonly accepted method of strap of yieldingmaterial which connects the hammer and the helve and actuates the hammerin the vertical movement thereof.

The principal inconvenience heretofore experienced in helve hammers ofthe typeof the present machine has been the replacing of a worn-cutcushion or buffer. I

It has been found by experience that the tubular rubber cushion orbuffer when the same is subjected to a destructive test will break downand will be destroyed in tvventy-seven (27) minutes or less. With thesolid rubber buffer or cushion of the present invention, it has alsobeen found by experience that with exactly the same kind of rubbermaterial, the solid rubber cushion or buffer, with the same destructivetest, will last more than sixty (60) minutes, which is a very materialincrease in the length of the life of the buffer or cushion. The rubberbuffer or cushion is not only increased in the length of its life by theimprovement of the present invention, but the operation is rendered muchsteadier and is stabilized also. When it becomes necessary to replacethe solid rubber buffer, it may be done more easily and quickly thanheretofore for the reason that the solid rubber buffer being secured tothe helve independently of the means for connecting the ram or hammerwith the helve, may be removed without disassembling the helve andhammer and the flexible connecting strap or yoke.

What is claimed is:

1. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting ofasolid block of resilient material located at the under side of the helveand presenting a lower impact face to the hammer, means for rigidlyfastening the cushion directly to the helve at the under side thereof tocause both of such parts to move as a unit and confine to the lower faceof the cushion the friction and impact incident to striking the hammer,and separate means for connecting the hammer with the helve permittingrelative movement to allow for the simultaneous reciprocating andpivotal movements of the hammer and the helve respectively.

2. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of asolid block of resilient material located at the under side of the helveand presenting a lower impact face to the hammer, means for rigidlyfastening the cushion directly to the helve at the under side thereof tocause both of such parts to move as a unit and confine to the lower faceof the cushion the friction and impact incident to striking the hammer,said cushion fastening means comprising a metal strap binding thecushion to the helve and exposing a portion of the cushion for contactwith the hammer, and separate means for connecting the hammer with thehelve permitting relative movement to allow for the simultaneousreciprocating and pivotal movements of the hammer and the helve.

3. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of asolid block of resilient material located at the under side of the helveand presenting a lower impact face to the hammer, means for rigidlyfastening the cushion directly to the helve at the under side thereof tocause both of such parts to move as a unit and confine to the lower faceof the cushion the friction and impact incident to striking the hammer,'said cushion fastening means comprising a metal strap binding thecushion to the helve and having an opening in its lower portion throughwhich the cushion projects for engaging the hammer.

4. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocatinghammer, of a cushion consisting of asolid block of resilient material located at the under side of the helveand presenting a lower impacti face to the hammer, means for rigidlyfastening the cushion directly to the helve at the under side thereof tocause both of such parts to move as a unit and confine to the lower faceof the cushion the friction and impact incident to striking the hammer,said cushion fastening means comprising a metal strap binding thecushion to the helve and having its lower portion cut away at the centerto form front and rear loops receiving portions of the cushion andpermitting the intermediate portion of the cushion to project beyond themetal strap for contact with the hammer.

5. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of asolid block of resilient material fitted directly against the under sideof the helve, means for rigidly fastening the cushion directly to thehelve to cause both of such parts to move as a unit and confine to thelower face of the cushion the friction and impact incident to strikingthe hammer, and separate means for connecting the hammer with the helvepermitting limited relative movement to allow for the simultaneousreciprocating and pivotal movements of the hammer and the helve.

6. In a helve hammer, the combination with a power-driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of'ablock of resilient material fitted directly against the under side ofthe helve, and having front and rear portions of less thickness than theintermediate portion, means engaging the said front and rear portions ofthe cushion for rigidly securing the same to the helve, and separatemeans for connecting the hammer with the helve for permitting relativemovement to allow for the simultaneous reciprocating and pivotalmovements of the hammer and the helve.

7. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of resilient material fitted directly against the under side ofthe helve and having front and rear portions of less thickness than theintermediate portion, a metal strap fitted on the helve and having frontand rear loops extending downwardly from the helve and receiving andengaging the said front and rear portions of v the cushion for rigidlysecuring the cushion to the helve for causing both of such parts to moveas a unit and confine to the lower face of the cushion the friction andimpact incident to striking the hammer, and separate means forconnecting the hammer with the helve.

8. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of resilient material fitted directly against the under side ofthe helve and having front and rear portions of less thickness than theintermediate portion, fastening devices piercing the helve and the frontand rear portions of the cushion for rigidly securing the cushion ,tothe helve, and separate means for connecting the hammer with the helvepermitting relative movement to allow for the simultaneous reciprocatingand pivotal movements of the hammer and the helve.

9. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of resilient material located at the under sideof the helve andpresenting a lower impact face to the hammer, means for fastening thecushion directlyto the helve comprising a plate vulcanized. to thecushion, and rigidly secured to the helve, and separate means forconnecting the hammer with the helve permitting relative movement toallow for the simultaneous reciprocating and pivotal movements of thehammer and the helve. v

10. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of resilient material located at the under side of the helve andpresenting a lower impact face to the hammer, means for rigidlyfastening the cushion to the helve comprising a plate vulcanized to thecushion and extending in advance and in rear of the same, and fasteningmeans for rigidly securing the extended portions of the plate to thehelve, and separate means for connecting the hammer with the helvepermitting relative movement to allow for the simultaneous reciprocatingand pivotal movements of the hammer and the helve.

11. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of rubber located at the under side of the helve and presenting alower impact face to the hammer, means for rigidly securing the cushiondirectly to the helve to cause both of such parts to move as a unit andconfine to the lower face of the cushion the friction and impactincident to striking the hammer, said cushion fastening means includinga plate vulcanized to the rubber and a fastening device piercing theplate ciprocating hammer, of a cushion consisting of a block of rubber,means for rigidly securing the block of rubber directly tothe under sideof the helve and flexible means separate from the cushion fasteningmeans for connecting the hammer with the helve, said cushion fasteningmeans being constructed and arranged to permit thecushion to be removedand replaced without disconnecting the hammer and the helve.

13. In ahelve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of resilient material rigidly secured'to the underside of thehelve to move with the same as a unit, said cushion being provided witha convex lower impact face for contact with the hammer, and separateflexible means for connecting the hammer with the helve.

14. In a helve hammer, the combination with a power driven pivotallymounted helve, and a reciprocating hammer, of a cushion consisting of ablock of resilient material rigidly secured to the underside of thehelve to move with the same as a unit, said cushion being provided witha convex lower impact face for contact with the hammer, and the hammerbeing provided with a flat top surface to be engaged by the cushion, andseparate flexible means for connecting the hammer with the helve. I e

15. In a helve hammer, the combination with a power driven pivotallymounted helve, of a reciprocating hammer having a flat top face, acushion consisting of a block of resilient material rigidly secureddirectly to the underside of the helve to move with the same as a unit,said cushion having a lower impact face for engaging the flat top faceof the hammer, and separate flexible means for connecting the hammerwith the helve.

EDWIN F. MEYERING.

